Race condition in OpenBSD VFS allows local users to cause a denial of service (kernel panic) by (1) creating a pipe in one thread and causing another thread to set one of the file descriptors to NULL via a close, or (2) calling dup2 on a file descriptor in one process, then setting the descriptor to NULL via a close in another process that is created via rfork.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openbsd | Openbsd | 2.6 (including) | 2.6 (including) |
| Openbsd | Openbsd | 2.7 (including) | 2.7 (including) |
| Openbsd | Openbsd | 2.8 (including) | 2.8 (including) |
| Openbsd | Openbsd | 2.9 (including) | 2.9 (including) |
References
- http://seclists.org/bugtraq/2001/Jun/0020.html
- http://www.securityfocus.com/bid/2817
- http://www.securityfocus.com/bid/2818
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6660
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6661
- http://seclists.org/bugtraq/2001/Jun/0020.html
- http://www.securityfocus.com/bid/2817
- http://www.securityfocus.com/bid/2818
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6660
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6661